All names: Gaia EDR3 684746949535655040, Gaia DR3 684746949535655040, GALEX J090315.4+204745, SDSS J090315.40+204743.80, SDSS J090315.40+204743.7, SDSS J090315.40+204743.8, LAMOST J090315.40+204743.8, Gaia DR2 684746949535655040
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | Gaia DR2 | Stilism | Guo et al. 2015 | Koester & Kepler 2015 | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 03 15.40 (0.09) | 09 03 15.40 | 09 03 15.40 (0.1) | 09 03 15.40 | 09 03 15.41 (0.09) | 09 03 15.40 | ||||||||
| Declination | 20 47 43.18 (0.06) | 20 47 43.78 | 20 47 43.21 (0.08) | 20 47 43.18 | 20 47 43.97 (0.06) | 20 47 43.83 | ||||||||
| Spectral type | DBA? | DB | DAB | DBA | DB | |||||||||
| Effective temperature | [K] | 17281.0 | 18850.0 | 16873.0 (43) | 19010.0 (1091) | 24454.0 (641) | ||||||||
| log(g) | [cgs] | 7.86 | 7.94 | 7.77 (0.03) | 7.93 (0.06) | 8.54 (0.03) | ||||||||
| Mass | [M☉] | 0.515 | 0.562 | 0.555 (0.05) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | |||||||||||||
| log(H/He) | -2.927 | -3.05 (0.2) | ||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | <-6.52 | |||||||||||||
| log(Ca/H) | ||||||||||||||
| Parallax | [mas] | 3.93 (0.1) | 3.95 (0.1) | 3.93 | 3.93 (0.1) | |||||||||
| Distance | [pc] | 254.26 (6) | 253.20 (9) | 247.00 | 254.26 | 254.26 (6) | ||||||||
| Composition | ||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -7.286864409 (0.1) | -7.559194599 (0.2) | -7.287 (0.1) | ||||||||||
| Proper motion (declination) | [mas/yr] | -49.2974241 (0.08) | -49.34861418 (0.1) | -49.297 (0.08) | ||||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 17.43 (0.01) | 17.43 (0.01) | 17.44 (0.02) | |||||||||||
| g magnitude | 17.51 (0.005) | 17.51 (0.005) | 17.53 (0.01) | |||||||||||
| r magnitude | 17.85 (0.007) | 17.85 (0.007) | 17.86 (0.02) | |||||||||||
| i magnitude | 18.12 (0.009) | 18.12 (0.009) | 18.14 (0.02) | |||||||||||
| z magnitude | 18.38 (0.03) | 18.38 (0.03) | 18.41 (0.03) | |||||||||||
| G magnitude | 17.68 (0.007) | 17.71 | 17.68 | 17.68 (0.003) | ||||||||||
| BP magnitude | 17.61 (0.007) | 17.57 | ||||||||||||
| RP magnitude | 17.85 (0.02) | 17.81 | ||||||||||||
| Pan g magnitude | 17.57 (0.006) | |||||||||||||
| Pan r magnitude | 17.85 (0.005) | |||||||||||||
| Pan i magnitude | 18.14 (0.006) | |||||||||||||
| Pan z magnitude | 18.37 (0.007) | |||||||||||||
| Pan y magnitude | 18.42 (0.04) | |||||||||||||
| E(B-V) | 0.020 | |||||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.